include/coff/z80.h

   1 /* coff information for Zilog Z80
   2    Copyright (C) 2005-2022 Free Software Foundation, Inc.
   3    Contributed by Arnold Metselaar <arnold_m@operamail.com>
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 #define L_LNNO_SIZE 4
  20 #include "coff/external.h"
  21
  22 /* z80 backend does not use dots in section names.  */
  23 #undef  _TEXT
  24 #define _TEXT "text"
  25 #undef  _DATA
  26 #define _DATA "data"
  27 #undef  _BSS
  28 #define _BSS "bss"
  29
  30 /* Type of cpu is stored in flags.  */
  31 #define F_MACHMASK 0xF000
  32
  33 /* Z80 COFF encodes the section alignment in the section header flags */
  34 #define COFF_ALIGN_IN_SECTION_HEADER 1
  35 #define COFF_ALIGN_IN_S_FLAGS 1
  36 #define F_ALGNMASK 0x0F00
  37 /* requires a power-of-two argument */
  38 #define COFF_ENCODE_ALIGNMENT(B,S,X) \
  39   ((S).s_flags |= (((unsigned) (X) & 0xF) << 8), true)
  40 /* result is a power of two */
  41 #define COFF_DECODE_ALIGNMENT(X) (((X) >> 8) & 0xF)
  42
  43 #define Z80MAGIC   0x805A
  44
  45 #define Z80BADMAG(x) (((x).f_magic != Z80MAGIC))
  46
  47 /* Relocation directives.  */
  48
  49 /* This format actually has more bits than we need.  */
  50
  51 struct external_reloc
  52 {
  53   char r_vaddr[4];
  54   char r_symndx[4];
  55   char r_offset[4];
  56   char r_type[2];
  57   char r_stuff[2];
  58 };
  59
  60 #define RELOC struct external_reloc
  61 #define RELSZ 16
  62
  63 /* Z80 relocations.  */
  64 #define R_IMM16   0x01          /* 16 bit abs */
  65 #define R_JR      0x02          /* jr  8 bit disp */
  66 #define R_IMM32   0x11          /* 32 bit abs */
  67 #define R_IMM8    0x22          /* 8 bit abs */
  68
  69 #define R_OFF8    0x32          /* 8 bit signed abs, for (i[xy]+d) */
  70 #define R_IMM24   0x33          /* 24 bit abs */
  71 #define R_IMM16BE 0x3A          /* 16 bit abs, big endian */
  72 #define R_BYTE0   0x34          /* first (lowest) 8 bits of multibyte value */
  73 #define R_BYTE1   0x35          /* second 8 bits of multibyte value */
  74 #define R_BYTE2   0x36          /* third 8 bits of multibyte value */
  75 #define R_BYTE3   0x37          /* fourth (highest) 8 bits of multibyte value */
  76 #define R_WORD0   0x38          /* lowest 16 bits of 32 or 24 bit value */
  77 #define R_WORD1   0x39          /* highest 16 bits of 32 or 24 bit value */